Heroku: Module not found

When I push my code to heroku he don't find my files:

Module not found: Error: Can't resolve './components/navigation/Navbar' in '/tmp/build_57c0b040126c80ff854d5d76e8a659a1/src'

This is my scripts in package.json
"scripts": {
"dev": "concurrently "nodemon -x 'npm start'" "npm run dev-server"",
"start": "babel-node server.js",
"dev-server": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
"eject": "react-scripts eject",
"heroku-postbuild": "npm run build"
}

node v6.11.0
npm v3.10.10

[gaearon]

Maybe it's called navbar.js in your Git repo, and this is a case sensitivity issue.
Try changing your import.

Thank you so muck !

I don't know why git doesn't check if I change the name of a file !

Thank you 👍

[gaearon]

To change file casing in git, you need to rename a file to something completely different, commit, and then rename it to the new name you wanted. It won't detect renames that only affect the file case.

[bluengreen]

This just got me last night. Ugh.